Help getting fish out of overflow

[ALang]

Amy,
It all depends on how they are put together.
Most of them are screwed into a bulk head instead of glued. But can your hand fit into the overflow box to try and turn the pipes?
How big are the gobies? You might be able to siphon them out one at a time, using a slightly larger diameter of tubing. You'd have to hold the suction until you get them out, which may be a very tough thing to do.
Keep us posted Amy.